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Percentage Worksheet – Mental Maths

Speed calculation lesson 12: Percentages in seconds · Set 728 · 40 questions
TalentJR

The fast method (Build from 10%): 10%: divide by 10. 1%: divide by 100. 5% = half of 10%, 20% = double 10%, 15% = 10% + 5%. 50% = half, 25% = half of a half.

NameDateTime takenScore ___ / 40
  1. 1.20% of 520 =
  2. 2.50% of 170 =
  3. 3.50% of 870 =
  4. 4.15% of 100 =
  5. 5.5% of 230 =
  6. 6.10% of 450 =
  7. 7.15% of 900 =
  8. 8.10% of 770 =
  9. 9.15% of 180 =
  10. 10.20% of 630 =
  11. 11.15% of 880 =
  12. 12.25% of 770 =
  13. 13.20% of 90 =
  14. 14.5% of 700 =
  15. 15.5% of 530 =
  16. 16.50% of 360 =
  17. 17.10% of 490 =
  18. 18.10% of 810 =
  19. 19.15% of 800 =
  20. 20.5% of 80 =
  21. 21.5% of 390 =
  22. 22.1% of 210 =
  23. 23.5% of 300 =
  24. 24.50% of 490 =
  25. 25.15% of 310 =
  26. 26.5% of 260 =
  27. 27.10% of 860 =
  28. 28.50% of 360 =
  29. 29.5% of 110 =
  30. 30.1% of 690 =
  31. 31.50% of 760 =
  32. 32.25% of 270 =
  33. 33.25% of 740 =
  34. 34.5% of 590 =
  35. 35.10% of 550 =
  36. 36.50% of 550 =
  37. 37.10% of 610 =
  38. 38.5% of 50 =
  39. 39.10% of 320 =
  40. 40.25% of 50 =

Answer key

  1. 104
  2. 85
  3. 435
  4. 15
  5. 11.5
  6. 45
  7. 135
  8. 77
  9. 27
  10. 126
  11. 132
  12. 192.5
  13. 18
  14. 35
  15. 26.5
  16. 180
  17. 49
  18. 81
  19. 120
  20. 4
  21. 19.5
  22. 2.1
  23. 15
  24. 245
  25. 46.5
  26. 13
  27. 86
  28. 180
  29. 5.5
  30. 6.9
  31. 380
  32. 67.5
  33. 185
  34. 29.5
  35. 55
  36. 275
  37. 61
  38. 2.5
  39. 32
  40. 12.5

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